feat: setup github provider with generic trait, proper routes, session & jwt handling, errors & user agent

pacman-server/src/auth/provider.rs

@@ -0,0 +1,25 @@
+use std::collections::HashMap;
+
+use async_trait::async_trait;
+use serde::Serialize;
+
+use crate::errors::ErrorResponse;
+
+#[derive(Debug, Clone, Serialize)]
+pub struct AuthUser {
+    pub id: String,
+    pub username: String,
+    pub name: Option<String>,
+    pub email: Option<String>,
+    pub avatar_url: Option<String>,
+}
+
+#[async_trait]
+pub trait OAuthProvider: Send + Sync {
+    fn id(&self) -> &'static str;
+    fn label(&self) -> &'static str;
+
+    async fn authorize(&self) -> axum::response::Response;
+
+    async fn handle_callback(&self, query: &HashMap<String, String>) -> Result<AuthUser, ErrorResponse>;
+}